"How I Met Your Mother" season 9, episode 18 airs tomorrow night after a short hiatus - find out where to watch online a free live stream of "How I Met Your Mother" season 9, episode 18, titled "Rally." Barney, Robin, Ted, Marshall, and Lily will face the morning of Barney and Robin's wedding!

If you can't make it to a TV by 8pm EST tonight to catch "How I Met Your Mother" season 9, episode 18, click here to watch "Rally" online via a free live stream!

If that doesn't work, CBS also offers episodes on their website to watch online the morning after an episode airs.

The "How I Met Your Mother" season 9, episode 18, titled "Rally," synopsis reads: "When Barney suffers from the world's worst hangover the morning of his wedding, the gang tries to figure out the far-fetched ingredients to concoct the Stinson Hangover Fixer Elixir."

According to Fashion & Style, "How I Met Your Mother" co-creators Carter Bays and Craig Thomas revealed more spoilers for the season in a Reddit AMA: "we will see more and more flash-forwards in the remaining 8 episodes," he said. "There's an episode called "RALLY" coming up in a few weeks where we do a whole bunch -- everyone gets a flash forward peek into the near and far future..."

Fashion & Style also reports that the pineapple mystery may soon be solved!

"You might find out what happened with the pineapple eventually," Bays said.

"We had always said we'd never reveal it, but now I'd say it's fifty fifty. It's always been an appealing idea to us artistically to leave it as the one mystery that never gets solved. But on the other hand, we do have an explanation for it that we like so it may make its way into these last few episodes."

Bays added that there will be more scenes with the Mother.

"We'll definitely get to see the entire gang with the Mother," he wrote.

The co-creators also revealed that Bob Saget, Scooter, and Robin Sparkles will return; and one of the last scenes in "How I Met Your Mother" season 9 will be set in MacLaren's.

"How I Met Your Mother" season 9, episode 18, "Rally" airs Monday night, on February 24, at 8 p.m. EST on CBS.